also: ジャニオタ
noun
Johnny's otaku; fan obsessed with Johnny's male idols
Slang abbreviation of ジャニーズオタク. Refers to a devoted fan of male idols from the Johnny & Associates agency. Often used in fan community contexts.
彼女は筋金入りのジャニヲタで、コンサートは全部行く。
She's a die-hard Johnny's otaku and goes to every concert.
ジャニヲタ歴10年の友人にグッズの集め方を教えてもらった。
I learned how to collect merchandise from a friend who's been a Johnny's otaku for 10 years.